NSES Content Standard A  
Science as Inquiry: Abilities necessary to do scientific inquiry  
Grades 5-8, page 145  

Identify questions that can be answered through scientific investigations. Students should develop the ability to refine and refocus broad and ill-defined questions. An important aspect of this ability consists of students' ability to clarify questions and inquiries and direct them toward objects and phenomena that can be described, explained, or predicted by scientific investigations. Students should develop the ability to identify their questions with scientific ideas, concepts, and quantitative relationships that guide investigation.

Benchmark 1A The Nature of Science: The Scientific World View
Grades 6-8, page 7
Some matters cannot be examined usefully in a scientific way. Among them are matters that by their nature cannot be tested objectively and those that are essentially matters of morality. Science can sometimes be used to inform ethical decisions by identifying the likely consequences of particular actions but cannot be used to establish that some action is either moral or immoral.

Benchmark 12A Habits of Mind: Values and Attitudes
Grades K-2, page 285
Raise questions about the world around them and be willing to seek answers to some of them by making careful observations and trying things out.